Influence of Imazethapyr on the Population Densities of Plant Parasitic Nematodes on Bean (Phaseolus vulgaris L.)

Plant Protection Institute, BG-2230 Kostinbrod, Bulgaria


Z. TRIFONOVA. and >A. PENEVA, 2003. Influence of imazethapyr on the population densities of plant parasitic nematodes on bean (Phaseolus vulgaris L.). Bulg. J. Agric. Sci., 9: 515–520

The influence of the herbicide imazethapyr on the population densities of plant parasitic nematode species on bean (Phaseolus vulgaris L.) was studied in field conditions. The commercial application of imazethapyr influenced upon endoparasitic lesion nematodes Pratylenchus ssp. only. The nematode population decreased in the plots treated with imazethapyr at rates of 0.08 and 0.16 g a.i. ha–1 from 13.9 to 42.8 % and from 27.1 to 50.7 % respectively. The observed trend in the dynamics of the nematode population persisted for one year only and was changed with the crop rotation. Imazethapyr did not markedly effect the population dynamics of ectoparasitic species: Helicotylenchus ssp., Paratylenchus ssp., Trichodorus ssp. and Xiphinema ssp.

Key words: imazethapyr, bean, nematodes, population dynamics, weeds, residues